Fiendish Servant: Up to 20th character level, a fiendish servant's powers depend on its master's character level, not his or her blackguard class level. After that, they depend on his or her blackguard level. For every five blackguard levels above 10th the fiendish servant gains +2 bonus Hit Dice, its natural armor in-creases by +2, and its Strength and Intelligence each increase by +1.

Fallen Paladins: A blackguard who trades in more than ten levels of paladin can gain more than ten levels of blackguard, but only if his character level is 21st or higher.